The Morphology Evolution of Nickel Phosphite Hexagonal Polyhedrons and Their Primary Electrochemical Capacitor Applications.

Nickel posphite (Ni₁₁(HPO₃)₈(OH)₆) hexagonal polyhedrons are successfully synthesized under hydrothermal conditions. The effect of surfactants on the growth mechanism of Ni₁₁(HPO₃)₈(OH)₆ are also explored. More importantly, Ni₁₁(HPO₃)₈(OH)₆ hexagonal polyhedrons are successfully applied as electrochemical supercapacitor electrode materials, which have a good specific capacitance (295 F g⁻¹ at 0.625 A g⁻¹), good rate capability, and cycling properties (maintained about 99.3% at 0.625 A g⁻¹ after 1000 cycles). [ABSTRACT FROM AUTHOR]